Fastening tool



FIG. 1 is a perspective view thereof;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view of the fastening tool in the actuated mode thereof.

The broken lines shown in the drawings represent unclaimed portions of the fastening tool and form no part of the claimed design. 

The ornamental design for a fastening tool, as shown and described. 